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Table 4 Classifications of IUA and AS by Donnez and Nisolle, 1994

From: Intrauterine adhesions (IUA): has there been progress in understanding and treatment over the last 20 years?

Degree Location
I Central adhesion
(a) Thin filmy adhesion (endometrial adhesions)
(b) myofibrous (connective adhesions)
II Marginal adhesions (always myofibrous or connective)
 (a) Wedge-like projection
 (b) Obliteration of one horn
III Uterine cavity absent on HSG
 (a) Occlusion of the internal os (upper cavity normal)
 (b) Extensive coaptation of the uterine walls (absence of the uterine cavity; true Asherman’s syndrome)